Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Fast, Reliable Duct Sealing Across Druid Hills
Duct sealing in Druid Hills typically costs $450 – $950 for a full system and is scheduled within a few days, not weeks. If you’re noticing weak airflow in your upstairs rooms, a fine layer of red dust on your millwork days after cleaning, or musty air when the AC cycles on, your ductwork is the likely culprit. Hollis Air Duct Alpharetta sends background-checked, uniformed technicians into Druid Hills with professional-grade equipment and a written price before any work begins, and we also offer our Dryer Vent Cleaning in Druid Hills. Call (762) 769-7145 for a free estimate.
Why Hollis Air Duct Alpharetta Is Druid Hills’s Preferred Duct Sealing Company
Druid Hills homeowners call us because the houses here are not like houses anywhere else, and the ductwork sure isn’t either. We’ve walked through 1920s Colonial Revivals off Oakdale Road, 1950s brick ranches near Lullwater, and Tudor Revivals up from Ponce de Leon Avenue. We know what original gravity-fed returns look like, where coal chutes got converted into supply plenums, and why a century of red Georgia clay ends up coating the inside of your ducts. That local knowledge means we don’t guess, and we don’t sell you work you don’t need.
Our crews coordinate dispatch from the brand’s Atlanta office, so scheduling is straightforward and trucks reach Druid Hills without the long wait times you get from out-of-state call centers. Every technician follows The Garrison Code: arrive inside the quoted window, price the job in writing before touching anything, complete the work by the book, and leave the site cleaner than we found it. Roy Castellanos leads the team, and his standard is simple: if it’s not done right within a year, we come back and make it right at no charge. That’s the 365-Day Done Right Promise, and it’s in writing on every job.
Styles & brands we work with
Air Duct Sealing in Druid Hills
Air Duct Sealing in Druid Hills means closing the gaps, joints, and disconnected runs in your duct system so conditioned air actually reaches the rooms it’s supposed to, instead of leaking into walls, crawlspaces, or attics. In older Druid Hills homes, the leaks are usually worse than average because the original metal ducts were installed decades before modern sealing standards existed. A typical sealing job for a 3-bedroom home here runs $450 – $750; larger historic homes with extensive duct runs can reach $950 or a bit more. The work is scheduled, not an emergency call, and it’s done right the first time with commercial mastic and foil tape rated for HVAC use.
Sealing We Do During a Clean
We often find that a homeowner calls us for Duct Sealing after noticing dust on furniture or weak airflow, and the real problem is hidden in disconnected runs behind original plaster. Our crews camera-inspect the system first. Then we source-remove debris under negative pressure, seal every accessible joint from the air handler to the floor registers, and verify the work with before-and-after airflow readings.
When Sealing Is the Right Fix
If your Druid Hills home still has original uninsulated metal ducts or returns cut into the floor, you’re losing a lot of conditioned air into unheated crawlspaces and wall cavities. Sealing those leaks usually pays for itself in lower utility bills within one cooling season. We give you a written price for the sealing work before we start, so you know exactly what it costs and what it covers.
Duct Sealing Services in Druid Hills
Duct Sealing Services in Druid Hills start with a camera inspection of the supply and return runs, because you can’t seal what you can’t see. On a 1920s Colonial Revival off Oakdale Road, our tech found crushed, disconnected runs behind original plaster walls plus a supply plenum coated in fine coal dust from the old basement coal chute. We removed the debris under negative pressure, HEPA-filtered the airflow, then sealed every joint from the air handler to the registers. Airflow increased 40%, and the red clay dust stopped coating the millwork. That’s the kind of job we see regularly in Druid Hills, and it’s why we inspect before we quote. Total cost for that kind of source-removal-plus-sealing job runs $650 – $950.
Source Removal Before Sealant
You cannot seal over coal dust, construction debris, or rodent nests and expect the sealant to hold. In Druid Hills, where many original ducts carry decades of fine black coal dust from converted coal chutes, we remove the contamination first using negative-air machines from Nikro and Abatement Technologies. Then we apply mastic and foil tape to clean, dry metal, which is the only surface a sealant will bond to properly.
Historic Home Sealing
Older plaster walls, original millwork, and ornate chimney surrounds need a careful hand. We use flexible inspection cameras to map duct runs without opening walls unnecessarily, and we protect floors and trim with drop cloths and corner guards before any work starts. Sealing a historic home’s system in Druid Hills requires this level of care, and it’s why homeowners with landmark-era houses call us instead of the cheapest bid.
We also serve Druid Hills as part of our broader Duct Sealing service area, so scheduling a visit is straightforward.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Druid Hills
We work on systems paired with filtration products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman, and we commonly see these brands in Druid Hills homes where homeowners have added whole-house air cleaners or upgraded media cabinets. Our trucks carry mastic, foil tape, and sealing materials compatible with these systems, so we’re not running to a supply house mid-job. If your air handler or filter housing is from a specific brand, just mention it when you call (762) 769-7145 and we’ll confirm compatibility before we arrive.
Common Duct Sealing Problems We See in Druid Hills Homes
- Coal dust in converted supply plenums: Many Druid Hills basements had coal chutes that got converted into supply plenums when forced-air systems replaced gravity heat. The signature fine black dust inside those ducts will ruin any sealant applied over it, so we source-remove it first.
- Crushed or disconnected runs behind original plaster: On 1920s and 1930s homes, settling foundations and old metal duct hangers fail over time. We camera-inspect to find runs that are crushed or pulled apart, because sealing only the accessible joints leaves the real leaks untouched.
- Brittle 1920s metal ducts that can’t take high-tack adhesives: Heat-damaged, thin-gauge original metal can crack if you apply the wrong sealant or pull too hard with foil tape. We select the right mastic and tape for the duct material and condition, and we test the bond before moving on.
- Humidity-driven mold on duct interiors: Druid Hills’s long, humid cooling season encourages mold growth inside uninsulated metal ducts, especially where cool air meets warm attic or crawlspace air. We identify and address those spots during sealing so you’re not sealing in a moisture problem.
See the difference
Before
After
Before
After
Before
AfterPricing for Duct Sealing in Druid Hills, GA
You can expect to pay $450 – $750 to seal the ductwork in a typical 3-bedroom Druid Hills home. Larger historic estates, like the Colonial Revival and Tudor Revival homes near Lullwater, often run $750 – $950 because the systems are larger and the runs are harder to access. If we’re also source-removing decades of coal dust, construction debris, or rodent nests before sealing, that adds $150 – $250 depending on how much material needs to come out. The price is written before we touch anything, and it does not move at the door. Call (762) 769-7145 for a free, no-pressure estimate.
We Also Serve Cities Near Druid Hills
Our crews handle duct sealing in Alpharetta, Cumming, Suwanee, and Canton as well, so if you have family or rental property outside Druid Hills, we can coordinate a single service call. The same written pricing, the same 365-Day Done Right Promise, and the same background-checked technicians apply everywhere we work.
Serving Druid Hills, GA - Our Local Coverage Area
We’re based in the Druid Hills area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Duct Sealing in Druid Hills
That fine black dust is almost always coal dust from the era when your basement coal chute was converted into a supply plenum, and it’s specific to early-20th-century Druid Hills homes. You must remove it before sealing, because mastic and foil tape will not bond to a dusty surface and will peel, releasing contaminated particles into your air. We source-remove it under negative pressure, HEPA-filter the airflow, and only then apply sealant. Call (762) 769-7145 for an exact quote.
Yes. We use flexible camera inspection to map the duct runs first, which means we don’t open walls unnecessarily and we find the leaks without exploratory demolition. Floors, trim, and corner moldings get protected with drop cloths and guards before any work starts, and our techs are trained to work around original plaster and millwork carefully. This is standard practice for us in Druid Hills, not an upsell.
If airflow is weak in upstairs rooms, dust reappears within days of cleaning, or you hear whistling from vents, you likely have leaks that cleaning alone won’t fix. We camera-inspect the system and measure airflow before quoting anything, so you get a straight answer on what’s actually leaking. Many Druid Hills systems need both: source removal and cleaning, then sealing to keep the system tight.
Sealing the supply side of your ductwork reduces the amount of humid crawlspace air being pulled into the system, which usually cuts the musty smell noticeably during cooling season. If the odor persists, the crawlspace itself may need moisture remediation, which is a different scope of work. We’ll tell you plainly which problem you have after the camera inspection.
The biggest mistake is using high-tack mastic or aggressive foil tape on thin, heat-damaged 1950s metal, which can crack the duct or pull away when the air handler cycles. We match the sealant and tape to the duct material and condition, and we test the bond before we consider the job done. That’s the difference between a seal that lasts years and one that fails in a season, and it’s why we inspect first.
Contact Hollis Air Duct Alpharetta for Duct Sealing in Druid Hills, GA
If you’re noticing dust on your millwork, weak airflow upstairs, or a musty smell when the AC runs, call (762) 769-7145 for a free estimate. We’ll schedule a camera inspection, give you a written price before any work starts, and stand behind the sealing with the 365-Day Done Right Promise. Roy Castellanos and the team at Hollis Air Duct Alpharetta serve Druid Hills with the discipline and care these old houses deserve.
Written by Roy Castellanos, Owner at Hollis Air Duct Alpharetta.